Boiler-check.



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No. 763,881. PATENTED JUNEZB, 1904. A. B. HALLER.

BOILER 011501;.

APPLIOA'I'ION FILED SEPT. 2. 1903.

2 SHEETS-SHEET 1- WITNESSES: [NVENTOR Attorney No. 763,881. PATENTED JUNE 28, 1904- A. B. HALLER.

BOILER CHECK.

APPLICATION FILED SEPT. z, 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

WITNESS; v ZNVENTOR l g, fllizosfiplya/m pm Atlomey s Pz'rzfis co. woraumov wAS-HNGTON a c UNITED STATES Patented June 28, 1904.

PATENT OFFICE.

BOILER-CHECK.

SPECIFICATION forming part of Letters Patent No. 763,881, dated une 28, 1904.

Application filed September 2, 1903. Serial No. 171,656. (No model.)

To all whmn it may concern.-

Be it known that LAMos BENJAMIN HALLER, a citizen of the United States, residing at Brunswick, in the county of Frederick and State of Maryland, have invented certain new and useful Improvements in Boiler-Checks, of which the following is a specification.

This invention has relation to check-gates adapted to be used in combination with steamboilers provided with injectors.

The object-of the invention is to provide a steam check-gate adapted to close the connection between the boiler and the check in case the valve or valve-seat of the check is impaired or the check itself should get out of order, thus preventing the escape of steam and water from the boiler through the check.

The device is also adapted to be used when it is desired to remove the check-valve for regrinding without having to put out the fire under the boiler and letting ofif the steam and withdrawing the water, as by closing the connection between the boiler and the check the steam of the boiler is prevented from escaping and the check-valve may be removed and reground and placed in position again, when the check-gate may be withdrawn and the parts are repaired without the loss of much time.

In the accompanying drawings, Figurel is a vertical sectional view of the check-gate located in the connection between the boiler and check-valve. Fig. 2 is a side elevation of the check-gate located in one of the halves of its casings. Fig. 3 is a perspective view of the check-gate and its stem.

The connection 1 between the boiler 2 and the check-valve casing 3 is provided with the check-gate casing 4. Said casing 4 is made in two halves, one of which, 5, is integrally attached to the connection 1, while the other, 6, is bolted to the half 5. The check-gate 7 is adapted to be moved vertically within the casing 4. IVhen said gate is in its upper position, it does not interfere with the course through the connection 1; but when in its lowest position, as shown in Figs. 1 and 2, it closes the steam-course through the connection 1 and prevents the escape of pressure from the boiler 2. The said gate 7 is broader and wider than the lateral and vertical dimensions of the course through the connection 1. (See Fig. 2.) Consequently the edges of the gate 7 are located beyond the confines of the course through the connection 1.

The front and rear faces of the gate 7 when in its lower position fit closely against the two halves of the casing 4, and therefore the said gate can stand an immense pressure and is not liable to leak or get out of place.

The upper edge of the gate 7 is provided with the ears 8 8, between the intermediate elevated portions of which is journaled the lower end of externally-threaded stem 9. The upper end of said stem passes through an internally-threaded opening 10 in the upper end of casing 4 and projects above the same. The cap 11 surrounds the said stem 9 and is screwed over the extreme upper ends of the halves 5 and6 of the casing 4. It will thus be seen that by turning the stem 9 the gate 7 may be moved up or down within the casing 4, according to the direction in which the said stem 9 is turned.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In combination with a steam-boiler having a connection provided with a check-valve, a

sliding gate-valve located in said connection, a casing for said gate-valve consisting of two halves secured together along their vertical edges, a cap surrounding the stem of the said gate-valve and confining the extreme upper ends of the halves of the casing.

In testimony whereof I aflix my signature in presence of two witnesses.

AMOS BENJAMIN HALLER. Witnesses:

. J. ARTHUR LYNHAM,

WM. ARoIIER RoBERTs. 

